What size circuit?

[McGee]

I have to feed a cord and plug connected compressor package (2 motors / 1ph 208V) with a package FLA of 18A (nameplate). The factory installed plug is rated for 20A.

Per 210-23 A (1) "utilization equipment shall not exceed 80% of the branch circuit rating",
Per 210-21 B (1) you need a 30A receptacle for a 30A circuit.

What size branch circuit and receptacle can I use without modifying the compressor.

Thanks in advance

 

[RUWired]

I have to feed a cord and plug connected compressor package (2 motors / 1ph 208V) with a package FLA of 18A (nameplate). The factory installed plug is rated for 20A.

Per 210-23 A (1) "utilization equipment shall not exceed 80% of the branch circuit rating",
Per 210-21 B (1) you need a 30A receptacle for a 30A circuit.

What size branch circuit and receptacle can I use without modifying the compressor.

Thanks in advance

McGee,article 210.23(A)1 is for equipment not fastened in place.I take it your equipment is not portable?

(1) Cord-and-Plug-Connected Equipment Not Fastened in Place The rating of any one cord-and-plug-connected utilization equipment not fastened in place shall not exceed 80 percent of the branch-circuit ampere rating.

If your FLA is 18 amps, then you did not exceed the 20 rating of the plug.

(1) Single Receptacle on an Individual Branch Circuit A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit.
Rick

 

[infinity]

Just size the receptacle according to the plug on the unit. A 20 amp circuit with a 20 amp receptacle and a 20 amp unit plug.

 

[bhsrnd]

(1) Cord-and-Plug-Connected Equipment Not Fastened in Place The rating of any one cord-and-plug-connected utilization equipment not fastened in place shall not exceed 80 percent of the branch-circuit ampere rating.
Rick

So, to muddy the waters, does this apply to a data center server rack? Does "fastended in place" mean cannot be moved at all except removal for servicing? Which in the case of a server or server rack the same COULD apply.